[llvm] r317710 - [WebAssembly] Call signExtend to get sign extended register

[Dan Gohman via llvm-commits]

Author: djg
Date: Wed Nov  8 11:24:21 2017
New Revision: 317710

URL: http://llvm.org/viewvc/llvm-project?rev=317710&view=rev
Log:
[WebAssembly] Call signExtend to get sign extended register

Patch by Jatin Bhateja!

Differential Revision: https://reviews.llvm.org/D39529

Added:
    llvm/trunk/test/CodeGen/WebAssembly/signext-arg.ll
Modified:
    llvm/trunk/lib/Target/WebAssembly/WebAssemblyFastISel.cpp

Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyFastISel.cpp?rev=317710&r1=317709&r2=317710&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/WebAssemblyFastISel.cpp (original)
+++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyFastISel.cpp Wed Nov  8 11:24:21 2017
@@ -541,7 +541,7 @@ unsigned WebAssemblyFastISel::getRegForU
 unsigned WebAssemblyFastISel::getRegForSignedValue(const Value *V) {
   MVT::SimpleValueType From = getSimpleType(V->getType());
   MVT::SimpleValueType To = getLegalType(From);
-  return zeroExtend(getRegForValue(V), V, From, To);
+  return signExtend(getRegForValue(V), V, From, To);
 }
 
 unsigned WebAssemblyFastISel::getRegForPromotedValue(const Value *V,

Added: llvm/trunk/test/CodeGen/WebAssembly/signext-arg.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/WebAssembly/signext-arg.ll?rev=317710&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/WebAssembly/signext-arg.ll (added)
+++ llvm/trunk/test/CodeGen/WebAssembly/signext-arg.ll Wed Nov  8 11:24:21 2017
@@ -0,0 +1,22 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -march=wasm32 | FileCheck %s
+
+declare i32 @get_int(i16 %arg)
+
+define i32 @func_1(i16 %arg1 , i32 %arg2) #0 {
+; CHECK-LABEL: func_1:
+; CHECK:       # BB#0: # %entry
+; CHECK-NEXT:    i32.const $push1=, 16
+; CHECK-NEXT:    i32.shl $push2=, $0, $pop1
+; CHECK-NEXT:    i32.const $push4=, 16
+; CHECK-NEXT:    i32.shr_s $push3=, $pop2, $pop4
+; CHECK-NEXT:    i32.call $push0=, get_int at FUNCTION, $pop3
+; CHECK-NEXT:    # fallthrough-return: $pop0
+; CHECK-NEXT:    .endfunc
+entry:
+  %retval = call i32 @get_int(i16 signext %arg1)
+  ret i32 %retval
+}
+
+attributes #0 = {noinline nounwind optnone}
+